Your primary reason for buying an ionizer is the superior drinking water, and the more powerful the ionizer, the more powerful the water. However, you will grow to really appreciate the ability to create the other special waters which are 100 times more alkaline (11.5 pH versus 9.5 pH) or 100 times more acidic (2.5 pH versus 4.5 pH).
You can see that all models except the R Model make 2.5 pH and 11.5 pH water... it's just that the more powerful the model, the more powerful the 2.5 and 11.5 in disinfecting and cleaning, respectively.
This capability is the primary reason the Enagic ionizers (and only Enagic) with 2.5 and 11.5 capability are classified as a medical device by the Japanese government.
Watch this demonstration video of the cleaning power of the 11.5 pH Strong Kangen Water:
Here are a few uses as outlined by Dr Peggy Parker:
Go back to Factors to Consider in Models